Comment by DaniFong

oxygen works and might be worth it for a stationary application like a powerplant for an AI data center. but NOx breaks down exothermically. so our approach if you hold the flame at >1300 C for less than a second or so you can destroy most of the NOx. This doesn't happen in a Diesel because the pulse stays that hot for only a short time, locking in the NOX that is produced. this is a matter of sizing the heat exchanger / flow rates correctly. we have to validate all this though. good question